Power driven mortising tool



May 2, 1933. J. c. zlPPERr-:R

POWER DRIVEN MORTISING TOOL 5 Sheets-Sheet l Filed Oct. 3, 1932 Home y By @AM May 2, 1933- J. c. zlPPERER POWER DRIVEN MORTISING TOOL Filed Oct. 3, 1932 5 Sheets-Sheet 2 Y Invehlor ZZzyy/vere/M/ B5 f1 Homey May 2, 1933. J. c. ZIPPERER POWER DRIVEN MORTISING TOOL 5 Sheets-Sheet 5 Filed Oct. 5, 1952 Inventar llorney,

By @M May 2, 1933. y J. c. ZIPPERER 1,906,783

POWER DRIVEN MORTISING TooL Filed Oct. 5, 1932 5 Sheets-Sheet 4 `Attorney B @Maa/52% May 2, 1933. J. c. zlPPl-:RER

POWER DRIVEN MORTISING TOOL Filed OCL. 3, 1.952 5 Sheets-Sheet 5 j l/lldAJX/ /K A f Inventor MAA/V By f1 llame y 50 on the line 6 6501? Figurer 1. o l

Patented yMay 2, 1933 JOHN c.. zIPPEnEn, or EVANsoN, ILLINOIS rowEanmvEN MoRrIsINe-'roon Applikation. inea october s; '1932. ser1a1.-No, assess..

' This invention relates-tota portablepower driven rotary to'olexpressly designedV for boring and mortising timbers used in constructional work.A

v In developing and. pefeting the .Struf-f,

ture, it has been'my'primary aimy to provide a .novel and practical assembly of parts `properly (1o-ordinated to provide a self-containedprime mover or power unit carried Y by an adjustable carriagefmounted on an adjustable base, whereby to permit the requisite relative adjustment ofparts neces*- sary` for expeditiousk and eiiicient work.

One feature. ofthe invention isf found in the. particular construction of a two-part base wherein the-lower part has adjustable clamping means for-attachment directly to the work, they upper part beingdaterally adjustable, that is, `at Eright angles to the 0 longitudinal dimension of the-work in order- -vto Aproperly position the carriage.

- Another featureof the inventiony is predicated:v upon the specific.construction-"and lof cation of the carriage, saidfcarriage beingA longitudinally adjustable on the movabler upper part of the base, wherebyto ypermit theA carriage to lbe centrally located and then intermittentl)74 shifted longitudinally in j order toy provide a recessin thework ofap.-v

0 propriate shape and'proportion. n @ther featuresfandadvanta es of'theinventionwill .become Ymore rea ily apparent ings.

` j ,Figure'fl is an? elevation,l with-parts rin section,` 'of the complete machine, the sec-l A tion being taken on the line `1 1 of Figure 2. FigureQ4 isfY a front end elevation of Fig- "ure'ljthatjisya view obseivingFigure 1v in a direction vfrom right to left. f

Figure 4 Vis a-top'plan view of thelower clamp-equipped ypart off the base.

` Figure 5 risa transverse vertical sectional view taken on the plane ofthe irregular iline 5 5 of Figure 1.H

Figure 6`is a -similarsectional view taken fromf'thel following description andi drawf Y eachr other and the jaws: arefashioned withretention hooks 21 seeFigure 7`) 'fengage- 95g able slidably with-the track flanges.v f

Figure 7 :is a section" on the line 7-7` of Figureli. f Y, Y

Figure 8v is al fragmentary detail elevational view. f 1

Figures 9 and 10 are sections ontlie lines 55 9 9 and 10-`10frespectively of Figure 2.

Referringfirst to the completev invention depicted in Figure 1,v itwill be observed that the work (a piece of timber).is generally de notedrby thefnumeral 11, the `recess therein '60 being distinguished bythenumeral Vl2. As i before implied', the machinefis of a portable nature and is adapted t0 ybe detachably' clamped to theV work; Thus Iv provide-:a novel clamp-equippedy adjustable base comprising upper and lower partsfor units l13 and y14 respectively. f i I As shown in Figure 4, the lowerpart comprses a pair of I-shaped tracks 15 disposedV inv spacedv parallelism and adapted to ex 70 tend: transversely Lacross the work', these tracks being joined Itogether through thek medium of a connective web 16 of the style* shown', said web beingfformed atits ycenter with a fixed feed nut 17.' v 7,5 y

, screw` is provided 'withright andleft threads for` adjusting 'the jawsv toward andfrom As shownin Figure 2; a hand cr`ank'22 is attachable to each: vfeed-screw 19 for convenient regulation of the clamping jaws. Re-

ferring again tosFigure 1 it will be observed 90 1 Y that the 'upper' relatively ladjustable `part or Figure 3 its, tp plan View of Figur- 1 unit lfof-the'base Vis of `general yU-s'hapedV portion is Vthreaded through` the? aforesaid 10Q feed nut 17. Again, a hand crank 27 is provided for convenient adjustment of this particular feed screw. f

The unit 13 is slidably coupled to the tracks 15 through the medium of coupling shoes 28 as plainly indicated in Figure l. This allows the entire unit 13 to be adjusted transversely of the work 11, that is, with respect to the relatively stationaryrpart 14 of the base.

Attention is now called to the numerals 29 which designate horizontally disposed spaced parallel bars mounted in the end members 23 and formed at one end with rack teeth 30. The numeral 3l designates a stop collar carried by one of the rack bars and held in place by a set screw 32. Attached to this collar is a gauge rod 33 provided with a stop collar 34 surrounding the toothed portion of the rack bar.

These rack bars 29 serve to adjustably support the longitudinally adjustable tool and prime mover carriage 35. This carriage comprises a plate 36 on which a gasoline motor or equivalent power plant 37 ismounted7 said plate being provided with depending legs 38 slidable along the rack bars. Attached to the outer pair of legs are bracketsL 39 formed with bearings forV a rotary shaft 40 carrying pinions 41 in mesh with the rack teeth. The shaft is provided withV a crank 42 for convenient adjustment of the carriage as a unit.

Attached to the carriage and'forming a part thereof are horizontal spaced parallel rails 43 to the outer ends of which a frame 44 is connected. Incidentally the numerals 45 merely designates braces for the frame and as shown in Figure 2 this frame is provided with upper and lower `guides 45 and 46 forthe rotary tool shaft 47. The shaft is turned through the instrumentality of a bevelled gear 48 receivingpower from a bevelled pinion 49 mounted onl an adjacent shaft 50 journalled in a suitable bearing 51 and operated by a pulley 52. The pulley receives power by way ofV a belt 53 trained thereover and also over a companion pulley 54 with which the motor 37 is provided as shown in Figure l. .l

The numeral 55 in Figures 2 and 9 designate-a lever for-engaging and disengaging the bevelled pinion 49 which lever is mounted on an extension 56 as shown in Figure 9 and held in adjusted position by a set screw 57. Detachably connected to the lower end of the tool shaft 47 is the boring or mortising tool 58 and mounted on the upper portion of the tool shaft'is a regulating stop collar 59 for regulating the depth of the recessin the work as is obvious. Incidentally, any type of tool head 58 may be used for boring and mortising the work.

In practice, the lower relatively-stationary section 14 ofthe base'is clamped Vtothe work 11 through the intermediacy of the clamping jaws 2() as shown in Figure 5. As before stated, these jaws are adjusted conveniently by proper manipulation of the handcranks 22. Then the upper relatively adjustable section 13 of thek base is shifted transversely with respect to the longitudinal dimension of the work through the medium of the adjusting screw 26 and handcrank 27 (see Figure 6). This serves to position the tool shaft over the desired place before the tool is set in operation.

A final adjustment of the tool is made by adjusting the tool carriage This is accomplished as is obvious through the medium of the rack bars 3() and co-operating pinions 41. The shaft 40 with its handcrank 42 permits this to be conveniently accomplished. Consequently the entire carriage including the motor and tool and associated parts may be bodily shifted when the tool is set into operation and then shifted in a direction from right to left in Figure 1 in order to permit the mortise to be longitudinally elongated. The gauge rod 33 and collar 34 is convenient in permitting the carriage to be accurately locatedforuniformity of work, that is, where timbers of like sizes require corresponding mortising.

It will be noted that the base is of a versatile nature in that it may be adapted to timbers of different proportions. It may be firmly clamped in place and readily detached to take advantage of the portability of the entire machine. After the part 14 is once clamped in place7 the relatively adjustable part 13 may be initially adjusted and subsequently adjusted during the operation of the tool to permit the tool to be properly located as conditions may require. Then too, the adaptability of the carriage 35 whereby it may be individually ladj ustable in a longitudinal direction adds to the practicability and utility of the structure in order that it may serve adequately in fulfilling the expected requirementsand results.

Itis probably unnecessary to say that the prime mover 37 may be either an electric motor or a gasoline engine whichever is desirable. Since the instantstyle and type of machine isprimarily adapted for farm use,

the gasoline engine power plant seems to be in demand.

It is thought from the foregoing description that the advantages `and novel features of the invention will bereadily apparent.

It is to be understood that changes may be made in the construction and in the combination and arrangement of the several parts provided that vsuch changes fall within the scope of the appended claims.

I claim:

1. A structure of the class described coinprising a two-part base7 the lower part of said base embodying spaced parallel tracks for adjusting said feed screw. f f

having bearingsV formed `at their oppositey ends, a web rconnecting said tracks together in spaced parallelism, said web beinglformed with a central feed-nut, a pairY of feed f screws journalled for rotation in the bearings of said tracks, work engaging andf clamping jaws'` slidablyQmounted on the tracks. and' operatively connected with said feed screws, the upper part of the base com-y prising afsubstantiall U-shaped structure including'vertical en members joined together by horizontal side members, said side members being formed with bearings l located in alinement ywith said' feed nut, av feed screw operable in said nut 'and jour'-, nalled in said bearings,and a hand 'crankl 2. A structure of the class described comprising a'two-part base, the lower part of said base embodying spaced parallel tracks i having bearings formed at their opposite'v ends, apweb connecting said tracks together yin spaced parallelism, said web f beingV formed with a'central feed-nut, apair of f feed screws journalled for rotation in the Vbearings of said tracks, work engagmgand clamping jaws slidably mounted on.. the,

tracks and operatively yconnected `with f, said feed screws, the upper part of the base comf prisingv a substantial? U-shaped structure including vertical en `members 'joinedto- Y gether'by horizontal side members, said side members being formed with bearings 4located in alinement with said Vfeed-nut, a j

feed screw operable lin said Vnut and journalled in said bearings, and a handcrank for adjusting said feed screw, a pair of I yspaced parallel horizontally disposed rack bars carried by the vertical end members of saidv base unie-coupling shoes slidablyjoiny ingfsaid upper part to; said tracks, a tool andmotor carriage slidably mountedfon said i i j rack bars and provided with pinions operatively connected with` the rack bars for `the purpose stated.

track member, a screw shaft carried byeach shoes depending therefrom for slidingly engagingthe track members,manually operated means for moving the second frame'on i the track members, a air of parallel rack bars` supported from t e upper part of the' second frame,"`a carriage slidably mounted on said rackbars, a shaft rotatably supported by the carriage, pinions on the shaftv engaging lthe rack teeth of said bars, a

handle for rotating the shaft, a toolcarried` by the carriage, a.-motor carried by the carriageA and means for operating the tool from'the motor. i n

In testimony whereof I affix my signature.

- v JOHN C. ZIPPERER? `3. In astructureof the class described, a l frame including; track members, a pair Vof -j depending jaws slidably arranged on each` 1 `,track member, a screw shaft carried'by each f ytrack member .and having oppositely arranged threads thereon and the jaws yhaving threaded holes therein through `which" the shaft passes, means for rotating the shafts to opera-te the jaws', ya nutmember carried bythe frame',a second frame, shoes depend'- ing from the second frame and engaging the 1 track members,a;screw shaftrotatably ar- I ranged in the second frame and through the ynut of the first, frame, means for rotating the last mentioned shaft for Passing f i adjusting the second frame `on Vthe ,first` 4 frame.

Y 4. In a structure ofthe-class described, ay ,v Y

frame includingtrack members,a pair ofy ldepending jaws slidably arranged on keach 70 f shaftsto'operatethe jaws, ja-second rame,. 

